EP 2537747 B1 20140528 - Propulsion system with contrarotating open rotors and its balancing method
Title (en)
Propulsion system with contrarotating open rotors and its balancing method
Title (de)
Antriebssystem mit gegenläufigem offenen Rotor und Ausgleichsverfahren dafür
Title (fr)
Système propulsif à hélices contrarotatives non carénées et son procédé d'équilibrage
Publication
Application
Priority
FR 1155507 A 20110622
Abstract (en)
[origin: EP2537747A1] The method involves eliminating or reducing a possible unbalance of a propulsive system (1) with front and back coaxial non streamlined contra-rotating propellers (2, 3), where the propellers comprise hubs (21, 31) concentrically surrounded by hub envelopes (22, 32) that are provided with external walls (23, 33). A mobile counterweight (40.1) is movably mounted on a guiding slot (24) coaxial to the corresponding hub envelope. Displacement of the mobile counterweight along the guiding slot is controlled as a function of an estimation of a possible unbalance of the propulsive system. An independent claim is also included for a propulsive system.
IPC 8 full level
B64C 11/00 (2006.01); F01D 5/02 (2006.01); F16F 15/36 (2006.01)
CPC (source: EP US)
B64C 11/008 (2013.01 - EP US); B64D 27/026 (2024.01 - EP); F01D 5/027 (2013.01 - EP US); F02K 3/025 (2013.01 - EP US); F16F 15/36 (2013.01 - EP US); B64D 27/026 (2024.01 - US); B64D 2027/005 (2013.01 - EP US); F05D 2250/41 (2013.01 - EP US); F05D 2250/44 (2013.01 - EP US); F05D 2260/57 (2013.01 - EP US); Y02T 50/60 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2537747 A1 20121226; EP 2537747 B1 20140528; FR 2977030 A1 20121228; FR 2977030 B1 20130712; US 2012328433 A1 20121227; US 8998580 B2 20150407
DOCDB simple family (application)
EP 12172343 A 20120618; FR 1155507 A 20110622; US 201213527749 A 20120620